So if you get an ore of the right type of radioactive element, and you wait millions and millions (or even billions) of years, you make a giant underground store of helium !
所以要是你获得了放射性元素的正确类型矿石后，等上数十亿年（甚至数万亿年）就能获得地下隐藏着的大量氦！
Planetary scientists can determine a rock's age by calculating how many radioactive "parent" isotopes of a particular element have decayed into "daughter" isotopes.
行星科学家们可以通过计算一个特定元素有多少“母亲”放射性同位素衰变为“女儿”同位素来确定岩石的年龄。
They had been interested in thorium — a radioactive element that can fuel nuclear reactors but not be processed into weapons.
他们当时对一种放射性元素钍很感兴趣，这种元素能驱动核反应堆，却不能制造生产成武器。
He said detection of the radioactive element caesium outside the No.1 reactor today was "a bad sign" for a core meltdown.
他说今天在第一核电站检测到放射性元素铯，这是核心融化的不好迹象。
This radioactive element has a half-life of some 5, 700 years.
这种放射性元素半衰期约为5700年。
A radioactive transuranic metallic element discovered by bombarding with helium atoms.
一种放射性的金属元素在用氦原子轰击时发现。
A radioactive transuranic metallic element produced by bombarding with helium nuclei.
一种放射性超铀元素在用氦核子轰击时发现。
Radium is a radioactive element.
镭是一种放射性元素。
Radioactive Element Detected Near Nuclear plant.
核电站附近发现辐射性元素。
That essentially means that it uses a radioactive element called americium-241 to spot smoke or harmful gasses.
从字面上可以了解到，它采用放射性元素镅241来探测烟雾或者有害气体。
Radium is a radioactive element.
镭是个放射性元素。
By surveying the data, we concluded that the radioactive element contents are higher in the alteration zone, middle in the mixed granite and lower in the ore veins.
从实测结果可知，放射性元素在不同岩性中的含量以蚀变带最高，混合花岗岩次之，石英(矿)脉中最低。
The majority radioactive fission products of the spent fuel elements in high temperature gas-cooled reactor(HTGR) is contained in the fuel element.
高温气冷堆乏燃料元件的放射性裂变产物绝大部分滞留在燃料元件中。
Polonium is a highly radioactive element and a metalloid.
钋是高放射性的元素，金属。
Radon is a common radioactive element in air, which is strongly harmful to the man's health. Man inhales radon and its daughters mainly from the indoor air.
氡是空气中常见的放射性元素，其对人体健康有强的危害作用，人体主要从室内空气中吸入氡及其子体。
It concerns a cat that is sealed inside a box for one hour along with a radioactive element and a vial of deadly poison.
内容是：一只猫被封闭在一个盒子里一个小时，和它一起的还有一些放射性元素和一瓶毒气。
Each element has at least one isotope with unstable nuclei that can undergo radioactive decay.
每个元素至少有一个同位素不稳定原子核可以进行放射性衰变。
In nature, the element, whose nucleus is unstable and will grows to be nuclear of other element, is called radioactive element.
在自然界，凡原子核不稳定，过一些时间自发地变成其它元素原子核的元素，称为放射性元素。
Like Galileo, Cassini is powered by the natural decay of the radioactive element plutonium, which generates heat that is then converted to electricity.
如同伽利略号，卡西尼号的能源来自放射性元素钸的自然衰变，产生热后再转换成电。
The undisputed link between the tests and a radioactive element in baby teeth provided much of the impetus for the 1963 test Ban Treaty, which outlawed above-ground nuclear weapons-testing.
试验与婴儿牙齿里放射元素之间的无可争辩的联系对于推动1963年的《禁止核试验条约》起了至关重要的作用。该条约宣布地面进行核武器试验非法。
A radioactive transuranic element in the actinide series, artificially produced in trace amounts. Its longest-lived isotope is No255 with a half-life of3 minutes. Atomic number102.
锘在锕类元素中的一种放射性超铀元素，人工微量制造，其最长寿命的同位素是锘255，其。
The water temperature originates in geothermy warming rate and the radioactive element decay has the heat energy.
水温来源于地热增温率及放射元素的衰变产生热能。
A silvery, metallic synthetic radioactive transuranic element.
一种合成的银色放射性超铀金属元素。
In July 1898, Madame Curie and her husband got a great success that they discovered the radioactive element, polonium, which Marie named after Poland.
1898年7月，居里夫人和她的丈夫取得了一项极大的成就- - - - -他们发现了一种放射性元素，玛丽以波兰这一名称的字头命名它为钋。
Polonium is a naturally radioactive metallic element.
钋是一种具有天然辐射性的金属元素。
Polonium is a naturally radioactive metallic element.
钋是一种具有天然辐射性的金属元素。
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